Plumbing contractors in Mercer Island, WA

6 contractors · Updated Nov 12, 2026

Plumbing contractors install and repair the water supply, drain, waste, and vent systems that carry water through a building. Washington currently lists 6 Plumbing contractors registered in Mercer Island.

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Eco Electric Plmbng Htng & Air

Listed

Residential · Mercer Island, WA

License #ECOELEP746BT · $6,000 bond

Eco Electric Plmbng Htng & Air

Listed

Journey Level · Mercer Island, WA

License #ECOELEPA6175 · $6,000 bond

Mjtk Backflow

Listed

Backflow Specialty · Mercer Island, WA

License #MJTKBB*763JA

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Built from Washington State L&I public records, updated Nov 12, 2026. Subser doesn't do star ratings or reviews — just verified records.